Cylinder-lock and key therefor.



m. 834,918. PATENTED NOV. 6, 1906.

P. K. LINDGREN.

.GYLINDER LOGK AND KEY THEREFOR.

APPLIOATION FILED JAN.23. 1906.

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' .Worcester, in the county of Worcester and Ta a/ll I whom it mayconcern: j

UNITED- (STATES PATENT 9mm.

[PAUL EINDGR'EN, OF WORCESTER, MASSACHUSETTS.

cYLmDEmL'ocK AND KEY THEREFOR.

Be it known that IQPAULK. LINDGREN, a subject of-athe"King of Sweden,residing at State of Massachusetts, have invented a new and useful:Improved Cylinder-Lock :and Key Therefor, of which the followingis aspecification, reference being madetherein-to the accompanying drawings.

The object. ofmy present invention is to provide a-cy1inder-lockofnovelconstruc 'tion which =--will afford alarge variety of differentaformswith a construction of similar principle an mode of operation in which aseries of. rolling disk. tumblers having teeth and-notchesare arrangedto cooperate with a key having. recesses therein-adapted for workingthetumblersas the key is inserted and withdrawn, as-.rnore fullyhereinafter explained. :l attain thisobject by themechanism explained inthe following detailed de-- scription and; illustrated intheaccompanying. drawings,=whereinv .F igurel is .a frontview. Fig. 2 is atransverse section through the mechanism at the position of: the lineX Xon Fig. 4. Fig. 3- is a;transverse-section of the cylinder only at thewar Fig.4 is a. longitudinal section of the cylinder at. line L Landaside view of. the interionparts. Fig. 5 is a longitudinalcentralsection on'line :W W, Fig. 1. Fig. 6 shows side viewsofthe-several tumblers. Figs. 7 and 8 show opposite side vieWs'of-the key.Fig." 91 is a cross-sectionof the key at line V V. Fig. .10 .is.=.aseparate view of the tumblerspring,and Fig. 11 a se arate side and edgeview of the tumbler-was er.

im roved cylinder-lock comprises a cylindrica shellC, having an annularfacinghead and, an interior projectingflange 10,

formed in segments integral with the cylinder andhaving spaces 5between-the ends of the segments which terminate with shoulders, asbest; shown in Figs. 2 and 3.

The .cylinder. at its rear end is externally fitted with a screw-threador other suitable means for attaching and holding it non-rotatable andsecure at any position where it is to be used, as. in connectionwith theframe of a door-latch mechanism or bolt mechanism, which mechanism beingno part of my pres ent invention is not herein shown.

Within the cylinder there is arranged a rotatable body or holder D,having a longitu- S'pecification of Letters Patent.

Application filed J'annaryZS. 1906. Serial No. 297,430-

gosition of line'Y Y on Fig. 4 looking fordinalkey-seat 12. therein 0enfrom'the front a with ra -shoulder that extends through the centralopening in "the cylinder-face, and 1a second shoulder or end, whichholder is-fitte offset 13, that fits adjacent to theinternalsegment-flange 10, also with a reduced ortionat its rear end whichextends beyo'n the end of the cylinder and has attached. thereto adetent'14 orany suitable means-for throwing a latch or bolt. (Notshownz)The holder or body D isrotatably confined Within the cylinder by anannularihead 115,. secured in the rear end of the cylindrical shell bypins, screws, or other suitable ifastenin'g means. two halves secured.together. by rivetins-.- orscrews 16. Within one-half of'the olderbodythere is a recess within-which Iarrange a series of flat disk tumblersE, in the'present instancefour, and indicated in their order in Fig. 6from left -to right as corresponding: with their order fromtoptobottom-in the other figures. Said tumblers are disposed in planesperpendicular to the plane of the-keyseat.

The holder: is preferably formedoof 3 They are mountedto revolve about"an axis-pin 17 located with its axisini the plane of the internal flangeIO-an'd; arallel with the plane of the key-seat-1'2. of tumblers F: aproximately corresponds'in width with the IIHQIlSiOIL of the spaces5between the ends of the flan e-segments'lO, and

the diameter of the tumb er-disks equals approximately the distancefromthe bottom of the key-seat to the inn-er'face of the cylinder. Washers18, Fig. 11,.are arrangedon position.

The tumbler-disks are made substantially as shown in Fig. 6, eachprovided with a central openingto fit the axis+pin,- aplain circleformed at one side and a series of detents or cogs 3, with intervening;recesses equalrtothe depth of the key-plate and of var ing'width, at theother side. Eachturnbler asz-asimilar releasing-recess 2 of suitableform r and area to accommodate the cross-section of the flange 10 andalso a tooth l adjacent-.tosaid recess of somewhat reater radial lengththan other parts of the (Fisk. This tooth-by conjtact with a lug 6 onthe body Dsto'psthe several tumblers in uniform alinement at theirprimary position. A part of the tumblerdisk at its plain circularperiphery. normally stands across the plane of the flange 10 when thetumblers are at normal position. This 1 the axis-pin to keep thetumblers in proper T e gang locks the parts and prevents rotation oftheholder within the cylinder until the tumblers are rotated to bring theirspace 2 into line with said flange.

The tumblers are each provided with a spring I of fine wire (see Fig.disposed in a coil about the axle-pin and having one end 8 inserted in asuitable hole formed in the holder-body and the other end 9 offset andinserted in a hole 7 in the tumbler-disk. The action of the spring'tendsto revolve the tumbler backwardto its primary position. The edge of thetumblers runs close to the bottom of the key-seat, so thata thin flatpiece, other than the key, cannot be inserted beneath them I The key Kis-f'ormed as a flat plate about one-sixteenth of an inch thick, moreorless, fitted to enter the key hole or seat 12 longitudinally ofthe'cylinder in alinement with and substantially tangentialto the circleof the tumbler-disks, the flat'plate of the key being per endicular tothe-planes of the tumblerdis s. 3 The key is provided with rows "ofholes or recesses 33, formed therein, each row corresponding'to oneof-the tumblers and having itsholes spaced "for receiving the points ordetents 3 of its particular tumbler. The side of the key -is preferablyprovided with a groove--20,one ormore, to match a ward 21, formed on theholder at one side of the keyhole, so that the key can be inserted onlyin one relative position. i 1

Inthe operation when the key is inserted into=the keyhole or key-seatthe recesses and detents engage and asa rack'and gear cause the partialrotation of the tumbl'ers,'so as to bring the tumbler-spaces2 intoalinement with the circle of the segment-flange 10, thus unlocking theholder, so that it can be freely revolved within the cylinder, andthereby through'the'medium of the connection at 14 operating any latchor bolt mechanism in connection with which this lock may be employed.Since there are spaces 5 in the flange 10 atopposite sides of thecylinder, the key can be inserted and Withdrawn when the gang oftumblers is coincident with either of said spaces. Whenthe key iswithdrawn,

the tumblers roll back to their first position with their long detent 1a ainst the stop-lug 6, where they are held by the springs I.

Any convenient number of tumblers F may be employed in the gang, eachoperating as specified, and the points 3 on the several tumblers can belocated on different radials and in different numbers for the severaltumblers", the holes or recesses in the respective keys thereforarranged to-correspond with the arrangement on the tumblers used in anyparticular instance. Thus locks of varied combination or individualityin great variety can beproduced.

I claim and desire to secure by Letters Patent 1. In a lock mechanism,the cylinder having the internal segment-flange, in combination with therevoluble holder or body fitting within said cylinder and having alongitudinal key-seat; a plurality of rotatable disk tumblers mounted insaid holder upon an axis-pin and in alinement for engaging saidsegment-flange, said tumblers having peripheral detents and recesses,and means insertible into said key-seat for rotating said tumblers,substantially as and for the purpose set forth.

2. In alock mechanism, the combination substantially as described, ofthe cylinder having an internal flange with spaces and shoulders for thereception of locking-tumblers, a rotatable body or holder confinedwithin said cylinder and having a flatkeyway therein, and provided withmeans for moving a latchor bolt, a gang of rotatable disk tumblerspivotally supported within a recess in said holder between the ke'fywayand cylindershell and engageable with said se mentflange, said tumblersprovidedwith variouslyarranged detents and a releasing-recess, and a keyprovided with holes or recesses therein that coact with the detents foractuating the tumbler to bring the releasing-recess of each tumbler intoalinement with the flange when the key isinserted' into said keyway.

3. The combination as described, of the cylinder having an annularfacing-flange, and an internal flange with spaces therein, the holderrotatable within said cylinder, means for confining said holder in thecylinder, the detented tumblers mounted in said' holder and engaging thesegment-flange, the axispin for said tumblers, washers on said pinadjacent to the tumblers, return-springs for the respective tumblers,and a key having rows of tumbler-engaging recesses conforming to thedetents of the several tumblers.

4. In a cylinder-lock mechanism of the character described, incombination with the cylinder having internal tumbler-arrestingshoulders, and the rotatable disk tumblers provided with peripheraldetents and recesses as set forth, of the rotatable holder formed in twohalf-sections withan intermediate longitudinal keyway, one of saidhalf-sections provided with a recess in which the tumblers are arrangedwith their planes perpendicular to the plane of said keyway, atransverse pivotpin for said tumblers, and means for securing thehalf-sections to each other.

Witness my hand this 20th day of January, 1906.

PAUL K. LIN DGREN. Witnesses:

CHAS. H. BURLEIGH, ELLA P. BLENUS.

